dye|World dye variety

Name:C.I.Direct Brown 179,C.I.21575

Molecular Structure: Double azo class

C.I.Direct Brown 179,C.I.21575,CAS 1325-25-3,602.42,C24H13N4Na3O9S,Ergan Soga Merah Toeah 4RG

Molecular Formula:C₂₄H₁₃N₄Na₃O₉S

Molecular Weight: 602.42

CAS Registry Number:1325-25-3

Manufacturing Methods : 4-Nitrobenzenamine diazo, coupling with  2-Hydroxybenzoic acid , will the nitro reduction for amino, then diazo, and Benzene-1,4-diamine coupling, were the last.

Properties and Applications: dark red light brown. Soluble in water for yellow to orange brown, soluble in ethanol. The strong sulfuric acid for blue, light olive gray diluted. The dye solution to join strong hydrochloric acid have blue-ray gray precipitation; Add thick sodium hydroxide solution for purple.

List of Suppliers:

Ergan Soga Merah Toeah 4RG( IG Farbenindustrie AG )